three-ray interference

On the basis of autocollimation principle, combining with grating interference principle, a new autocollimation interferometry method was put forward which can measure three-dimensional angular distortion.

以自准直原理基础，将光栅干涉原理引入，提出了一种能对船体三维变形测量的自准直干涉法。

This paper discusses three types of interference: spurious emission, intermodulation and block distortion. It also innovates fractional frequency reuse from physical layer and data link layer.

本文讨论了三种主要的干扰类型&杂散干扰、互调干扰和阻塞干扰，并结合物理层与数据链路层对规避干扰的分数频率复用法进行了创新。

Three quenched bushes are pressed on the hollow spindle ( sleeve) with a big interference fit, thus the spindle can move forward and backward precisely within the bush.

三个大干涉配合的淬火衬套压装在空心轴（镗套）上，因此，主轴能在衬套内前后精确移动；

APR algorithm is close to the theoretical lower bound of time. APR algorithm which has high meter reading success rate can run without routing knowledge. It is the strongest algorithm to overcome the time-varying and random interference in all of three algorithms.

APR算法接近理论时间下界，抄表成功率高，无需路由知识，可以从零路由知识开始运行，同时APR算法克服时变性和随机干扰的能力最强。

The Measurement of Nano-scale Gas Film of Magnetic Head/ Disk by the Three-wavelength Optical Interference

三波长光干涉法测量磁盘/磁头纳米级气膜厚度